diff --git a/pages/common/pngcrush.md b/pages/common/pngcrush.md
index 4c5db08799..f44168c681 100644
--- a/pages/common/pngcrush.md
+++ b/pages/common/pngcrush.md
@@ -1,6 +1,7 @@
 # pngcrush
 
 > PNG image compression utility.
+> More information: <https://pmt.sourceforge.io/pngcrush>.
 
 - Compress a PNG file: